This paper presents One Problem One Drop (OPOD) with a primary focus on NNO (Nasal Navel Multi Solution) and explores the physiological significance of the nasal pathway through current understanding of nasal physiology, oxygen transport, parasympathetic nervous system regulation, the vagus nerve and the gut–brain axis. Preliminary user observations related to respiratory comfort, sleep and general well-being are also discussed as exploratory findings. The paper proposes that supporting healthy nasal physiology represents a promising preventive and curative approach and highlights the need for further studies and controlled clinical investigations to evaluate the role of NNO within the broader OPOD framework.
G. V. R. Mohana Rao (Tue,) studied this question.
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